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Webcast-Catalyst9k
New Member

NIC behavior on IEEE802.1Q ports

Attach a regular Ethernet-NIC to a dot1q trunk port.

Traffic on the native VLAN will be transported to the appropriate protocol stack(s).

Question: What will happen to frames comming in with a tag (VLAN-ID not 0)?

Is it correct to assume that those packets will loose

their tag when they enter the NIC port.

And beeing processed like any other packet that is comming in on the native VLAN?

Of course, I talk about a situation where the NIC is not configured as a trunk port. Just a regular PC/Server-NIC.

Juergen

1 REPLY
New Member

Re: NIC behavior on IEEE802.1Q ports

I believe that once configured for trunking, the switch will prepend all ethernet frames destined for that port with the vlan tag, thereby making it unreadable by any NIC not configured to read tagged frames. This may appear as CRC or framing errors at the NIC level. Regardless it will not work.

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